With its internal Roll Cage reinforcement and rugged In-mold construction, Giro's Pneumo offers excellent protection no matter how fast you ride. Its 19 massive Wind Tunnel vents scoop air and channel it around your head for superb ventilation. And, the sculpted fit and Roc Loc 4 fit system will make you wonder if it wasn't your head that Giro used to design the Pneumo. In fact, the ventilation, light weight and superb fit are so impressive, you might wonder if you're wearing a helmet at all.